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lions [1.4K]
3 years ago
14

Three times the sum of a number and 4 look like as a variable expression?

Mathematics
1 answer:
Sonja [21]3 years ago
7 0
3(x+4)
Hope this helped
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Simplest form of -1 5/8 divided by 5 8/9
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the answer is -117/424, hope this helps :)

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An equilateral triangle has a base of 44 meters and a height of h meters. Inside that triangle is constructed a second equilater
TEA [102]

Answer:

6.25 %  of area of Large triangle =  area of smallest triangle

Step-by-step explanation:

Area of large triangle L = (1/2)*base*height

L = (1/2)*(44 m)* h

L = 22*h  square m.

2nd equilateral triangle area:  S =(1/2)*(22 m)*(0.5h)

S = 5.5*h sq. m.

3rd smallest equilateral triangle area : T = (1/2)*(11 m)*(0.25h)

T = 1.375*h sq. m

-----

Find percent P  where  T = P* L,     1.375*h = P * 22*h

P = 6.25%  = 0.0625

4 0
3 years ago
Simplify the expression. What classification describes the resulting polynomial?
valentinak56 [21]

Answer:

A quadratic Trinomial

Step-by-step explanation:

hope this helps

Given

(3x² - 11x - 4) - (2x² - x - 6)

Distribute both parenthesis, noting the second is distributed by - 1

= 3x² - 11x - 4 - 2x² + x + 6 ← collect like terms

= x² - 10x + 2 ←  this is a quadratic with 3 terms, thus trinomial → A

8 0
3 years ago
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A recent survey found that 30% of telephone users have switched completely to cell phone use (i.e. they do not have landlines in
Genrish500 [490]

Answer:

The probability that exactly 30% of these 10 telephone users do not have landlines in their homes is 0.2668.

Step-by-step explanation:

We are given that a recent survey found that 30% of telephone users have switched completely to cell phone use (i.e. they do not have landlines in their homes).

A random sample of 10 of these customers is selected.

The above situation can be represented through binomial distribution;

P(X = r) = \binom{n}{r}\times p^{r} \times (1-p)^{n-r}; x = 0,1,2,3,......

where, n = number of trials (samples) taken = 10 customers

            r = number of success = 30% of 10 = 3

            p = probability of success which in our question is the probability

                  that telephone users do not have landlines in their homes,

                   i.e. p = 30%

Let X = <u><em>Number of telephone users who do not have landlines in their homes</em></u>

So, X ~ Binom(n = 10, p = 0.30)

Now, the probability that exactly 30% of these 10 telephone users do not have landlines in their homes is given by = P(X = 3)

           P(X = 3) =  \binom{10}{3}\times 0.30^{3} \times (1-0.30)^{10-3}

                         =  120 \times 0.30^{3} \times 0.70^{7}

                         =  <u>0.2668</u>

4 0
3 years ago
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